Jul 27, 2011 5:30pm PDT
in a brazen attack. cell phone safety: to all those minutes add up to health problems for kids? dr. jon lapook reports. and it's a place where wounded warriors learn to hope again. david martin on the closing of walter reed. captioning sponsored by cbs this is the "cbs evening news" with scott pelley. >> schieffer: good evening, scott's off tonight. i'm bob schieffer. the fallout from washington's inability to find a solution to the budget crisis and raise the debt limit has, apparently, begun. on wall street, the stock market was down for the third day in a row. the dow fell more than 198 point today. for the week, it's down nearly 400 points, and it has lost close to $105 billion in value. some of the bond rating services are now saying that even if congress does reach an agreement on a budget plan, it may be too late to avoid lowering the rating on some american securities. we have three reports tonight on that and what it means for small business and your credit card. and we start with anthony mason. anthony. >> reporter: bob, america's credit rating has never fallen below triple "a,"
Jul 27, 2011 7:00pm EDT
. dr. jon lapook has more on that. >> reporter: with a generation of kids connected to each other through cell phones, doctors like keith black have concerns about safety. >> what we know is that the microwave radiation from cell phones will penetrate deeper into the child's brain and more of the radiation goes into the brain because the scalp is thinner, the skull is thinner. >> reporter: in today's study, researchers compared cell phone use in healthy children and 352 brain tumor patients between the ages of seven and 19. cell phone use did not significantly increase the risk of a brain tumor. this research comes just two months after the world health organization categorized cell phones as possibly carcinogenic. 75% of teenagers now have a cell phone, up from fritsch% in 2004 so a clearer picture of safety will only come from long-term study. >> what we're really concerned about is the child who begins using the cell phone at seven or 12, when they become an adult after 20 or 30 years of using the cell phone, is their risk higher? that is not answered by this study. >> reporter